a+b = 889
a = 3×b:4 |×4
4×a = 3×b => a = 3×b/4
inlocuim in prima ecuatie pe a
3×b/4+b = 889 |×4
3×b+4×b= 3 556
7×b = 3 556
b = 3 556:7
b = 508
a = 889 -508
a = 381
Verificare:
381+508 = 889
381 = 3×508:4
381 = 3×127
381 = 381
sau rezolvarea grafica:
a |____|____|____|
b |____|____|____|____|
avem 7 segmente egale = 889
889 :7 = 127 ( un segment)
a = 3×127 = 381
b = 4×127 = 508
a = 381
b = 508
